Primary prevention
Primary prevention consists of reducing environmental exposure to antigens that can cause HP; for example, dairy farmers now use ventilation and dehumidification systems to significantly reduce the likelihood that thermophilic bacteria will be growing in their hay during the winter season. This environmental intervention has significantly reduced the prevalence of farmer's lung among Wisconsin dairy farmers.[31][32]
Secondary prevention
Avoidance of the causative agent is key in managing HP. This may involve workplace reassignment or environmental interventions, such as dehumidifiers, and adequate/well-maintained ventilation systems. Environmental hygiene is also important: for example, cleaning out the crawl space (a type of basement in which one cannot stand up).
Routine influenza, pneumococcal, and coronavirus disease 2019 (COVID-19) vaccinations are recommended.[63]
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